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TPS54678_17

更新时间： 2024-09-20 02:58:27
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
37页 1647K
描述
2.95-V to 6-V Input, 6-A Output, 2-MHz, Synchronous Step-Down SWIFT Switcher

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TPS54678_17 数据手册

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TPS54678  
www.ti.com  
SLVSBF3 –JUNE 2012  
2.95 V to 6 V INPUT, 6 A OUTPUT, 2 MHz, SYNCHRONOUS STEP DOWN SWITCHER WITH  
INTEGRATED FET ( SWIFT™)  
Check for Samples: TPS54678  
1
FEATURES  
DESCRIPTION  
TPS54678 device is a full featured 6 V, 6 A,  
synchronous step down current mode converter with  
two integrated MOSFETs.  
2
•
Two 12 mΩ (typical) MOSFETs for High  
Efficiency 6 A Continuous Output Current  
•
•
200 kHz to 2 MHz Switching Frequency  
TPS54678 enables small designs by integrating the  
MOSFETs, implementing current mode control to  
reduce external component count, reducing inductor  
size by enabling up to 2 MHz switching frequency,  
and minimizing the IC footprint with a small 3 mm x 3  
mm thermally enhanced QFN package.  
0.6 V ±1% Voltage Reference Over  
Temperature (-40°C to 150°C)  
•
•
•
•
•
Synchronizes to External Clock  
Start up with Pre-Biased Voltage  
Power Good Output  
TPS54678 provides accurate regulation for a variety  
of loads with an accurate ±1% Voltage Reference  
(VREF) over temperature.  
Adjustable Slow Start and Sequencing  
Cycle-by-Cycle Current Limit and Hiccup  
Current Protection  
Efficiency is maximized through the integrated 12 mΩ  
MOSFETs. Using the enable pin, shutdown supply  
current is reduced by disabling the device.  
•
•
Adjustable Input Voltage UVLO  
Thermally Enhanced 16-Pin 3 mm x 3 mm QFN  
(RTE)  
The output voltage startup ramp is controlled by the  
soft start pin that can also be configured for  
sequencing or tracking. Monotonic startup is achieved  
with pre-biased voltage. Under voltage lockout can be  
increased by programming the threshold with a  
resistor divider on the enable pin. An open drain  
power good signal indicates the output is within 93%  
to 105% of its nominal voltage.  
APPLICATIONS  
•
•
Low-Voltage, High-Density Power Systems  
Point of Load Regulation for High Performance  
DSPs, FPGAs, ASICs and Microprocessors  
•
•
•
Broadband, Networking and Optical  
Communications Infrastructure  
Gaming, DTV and Set-Top Boxes  
Cycle-by-cycle current limit, hiccup overcurrent  
protection and thermal shutdown protect the device  
during an overcurrent condition.  
95  
94  
93  
92  
91  
90  
89  
88  
VIN  
VIN  
TPS54678  
CI  
CBOOT  
BOOT  
EN  
LO  
VOUT  
PH  
PWRGD  
CO  
R1  
VOUT = 1.8 V  
Fsw = 500 KHz  
DCR = 7.5 mΩ  
87  
86  
85  
VIN = 3.3 V  
VIN = 5 V  
VSENSE  
GND  
SS/TR  
RT/CLK  
COMP  
1
2
3
4
5
6
R2  
Current (A)  
G020  
CSS  
R3  
RT  
C1  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
SWIFT, PowerPAD are trademarks of Texas Instruments.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2012, Texas Instruments Incorporated  
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